Published on

[Garmin Firmware ChangeLog]: What does 28.03 Beta changed | Forerunner 255 Series

garminchangelogfirmware-updateforerunner-255beta

Overview

Garmin has released Public Beta Version 28.03 for the Garmin Forerunner 255 Series. This running watch update focuses on training-plan consistency, Garmin Connect synchronization, race event handling, and workout reliability.

The official announcement lists this as Public Beta Version 28.03 - 20%. This update is at 20% phased rollout for the Forerunner 255 Basic and Music models.

Update Details

  • Device: Garmin Forerunner 255 Series
  • Software Version: 28.03 Beta
  • Release Date: May 18, 2026
  • Channel: Public Beta Program (20% phased rollout)
  • Install Path: Main menu > Settings > System > Software Update > Check For Updates
  • Official Announcement: Garmin Forums

Garmin Forerunner 255 Series 28.03 Beta Changelog

According to Garmin's official announcement, version 28.03 Beta includes the following changes:

Race, Coaching & Garmin Connect Fixes

  • Fix an issue that could cause some race events to be missing or duplicated after sending to device.
  • Fix an issue that could cause the Garmin Run Coach plan's week number shown on the device to be different than what is shown on Garmin Connect Mobile.
  • Fix the display settings not applying when changed from Garmin Connect Mobile.

Workout, Upload & Device Fixes

  • Fix pairing to Schwinn devices.
  • Fix an issue with previewing workouts with only one step.
  • Fix an issue that could cause some activities to fail upload to Garmin Connect.

Audio Prompts & General Improvements

  • Specify completion time in audio prompts for distance intervals.
  • Various bug fixes and improvements.

Why This Update Matters

Cleaner Race Planning

The race event fix helps prevent a frustrating sync problem where events could be missing or duplicated after being sent to the watch. That matters when the Garmin calendar is part of your race-week planning.

Better Coaching Consistency

The Garmin Run Coach week-number fix keeps the watch and Garmin Connect Mobile aligned, which is important for runners following structured plans rather than checking two different week labels.

More Reliable Sync and Workouts

Fixes for display settings, one-step workout previews, and Garmin Connect activity uploads reduce friction in the training workflow. The Forerunner 255 28.03 beta is a practical cleanup release for runners who still rely on the 255 as a training-first watch with Garmin Connect, coaching, race planning, and indoor equipment pairing.

How to Get the Update

To download this Garmin beta firmware manually:

  1. Open the Main menu
  2. Go to Settings
  3. Select System
  4. Choose Software Update
  5. Tap Check For Updates

This update is at 20% phased rollout for the Forerunner 255 Basic and Music models.

Conclusion

Garmin Forerunner 255 Series Beta 28.03 is a focused firmware update for beta testers who want a more reliable running watch experience. The most important fixes are race event sync, Garmin Run Coach consistency, Garmin Connect Mobile settings, activity uploads, and workout handling.